250+ TOP MCQs on Disadvantages of Two Stroke Engines and Answers

IC Engine Question Bank on “Disadvantages of Two Stroke Engines”.

1. High speed two stroke engines are ____________ efficient owing to the reduced volumetric efficiency.
a) high
b) less
c) equal
d) none of the mentioned
Answer: b
Clarification: None.

2. With engines working on Otto cycle, a part of the mixture is lost as it escapes through the exhaust port during scavenging.
a) True
b) False
Answer: a
Clarification: None.

3. In Otto cycle, with increase in fuel consumption, thermal efficiency is __________
a) increased
b) reduced
c) remains same
d) none of the mentioned
Answer: b
Clarification: None.

4. Part of the piston stroke is lost with the provision of the ports thus the effective compression is less in case of two stroke engines.
a) True
b) False
Answer: a
Clarification: None.

5. Two stroke engines are liable to cause a ____________ consumption of lubricating oil.
a) lighter
b) heavier
c) unpredictable
d) none of the mentioned
Answer: b
Clarification: Two stroke engines are liable to cause a heavier consumption of lubricating oil while in four stroke the consumption is less.

6. With heavy loads, two stroke engines get heated due to excessive heat produced.
a) True
b) False
Answer: a
Clarification: None.

7. At light loads, the running of the engine is not very smooth because of the __________ dilution of charge.
a) decreased
b) increased
c) equal
d) none of the mentioned
Answer: b
Clarification: None.

8. Which of the following engines will have heavier flywheel than the remaining ones?
a) 30 kW four stroke petrol engine running at 1500 r.p.m
b) 30 kW two stroke petrol engine running at 1500 r.p.m
c) 30 kW two stroke diesel engine running at 750 r.p.m
d) 30 kW four stroke diesel engine running at 750 r.p.m
Answer: a
Clarification: The flywheel in a four stroke petrol engine is heavier than in a two stroke petrol engine and there is no flywheel in a diesel engine.

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